Patent EP0407773A2 successfully refreshed from Google Patents.
EP0407773A2
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EP
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Improved holographic notch filters
Assignee: EIDP Inc
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Filing: 1990-06-20
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Granted: —
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Expires: 2010-06-20
Abstract
Abstract Holographic notch filters are provided that comprise photopolymer films, having an optical density of at least 2, mounted on a transparent substrate.
Inventors
- 👤 Dalen Eugene Keys
- 👤 William Karl Smothers
- 👤 Torence John Trout
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 16:49
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03H; G03H1/00; G03H1/04; G02; G02B; G02B5/00; G02B5/20; G02B5/203; G02B5/32; G03F7/0005; G03F7/001; G03H1/02; G03H1/18; G03H1/22; G03H1/24; G03H1/182; G03H2001/026; G03H2240/00; G03H2240/50; G03H2240/54; G03H2250/00; G03H2250/44; G03H2260/00; G03H2260/12; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/113
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
155 words
A holographic notch filter comprising a transparent substrate that bears a transparent polymeric film containing a reflection hologram, said reflection hologram having an optical density of greater than approximately 2 at the wavelength of maximum reflection and said film, prior to recording of the hologram, consisting essentially of: (a) approximately 25 to 75% of a polymeric binder selected from the group consisting of polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl formal, interpolymers containing major segments thereof, and mixtures thereof; (b) approximately 5 to 60% of an ethylenically unsaturated monomer selected from the group consisting of carbazole containing monomers and a liquid monomer containing one or more phenyl, biphenyl, phenoxy, naphthyl, naphthyloxy, heteroaromatic groups containing up to three aromatic rings, chlorine and bromine; (c) approximately 0 to 25% of a plasticizer; and (d) approximately 0.1 to 10% of a photoinitiator system activatable by actinic radiation; wherein said percentages are weight percentages based on total film weight.
Claim 2
Dependent Claim
155 words
A holographic notch filter comprising a transparent substrate that bears a transparent polymeric film containing a reflection hologram, said reflection hologram having an optical density of greater than approximately 2 at the wavelength of maximum reflection and said film, prior to recording of the hologram, consisting essentially of: (a) approximately 25 to 75% of a polymeric binder selected from the group consisting of polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl formal, interpolymers containing major segments thereof, and mixtures thereof; (b) approximately 5 to 60% of an ethylenically unsaturated monomer selected from the group consisting of carbazole containing monomers and a liquid monomer containing one or more phenyl, biphenyl, phenoxy, naphthyl, naphthyloxy, heteroaromatic groups containing up to three aromatic rings, chlorine and bromine; (c) approximately 0 to 25% of a plasticizer; and (d) approximately 0.1 to 10% of a photoinitiator system activatable by actinic radiation; wherein said percentages are weight percentages based on total film weight.
Claim 3
Dependent Claim
25 words
The holographic notch filter of claim 1 wherein the filter has an optical density of at least approximately 3 at the wavelength of maximum reflection.
Claim 4
Dependent Claim
25 words
The holographic notch filter of claim 1 wherein the transparent substrate is selected from the group consisting of glass, quartz, polymethyl methacrylate, polycarbonate, and polystyrene.
Claim 5
Dependent Claim
15 words
The holographic notch filter of claim 1 additionally comprising one or more transparent polymeric films.
Claim 6
Dependent Claim
18 words
The holographic notch filter of claim 1 additionally comprising a protective layer attached to the transparent polymeric film.
Claim 7
Dependent Claim
19 words
The holographic notch filter of claim 1 wherein the hologram has a refractive index modulation greater than approximately 0.01.
Claim 8
Dependent Claim
37 words
The holographic notch filter of claim 6 wherein the ethylenically unsaturated monomer is selected from the group consisting of 2-phenoxyethyl acrylate, 2-phenoxyethyl methacrylate, phenol ethoxylate monoacrylate, 2-(1-naphthyloxy)ethyl acrylate, o -biphenyl methacrylate, o -biphenyl acrylate, and mixtures thereof.
Claim 9
Dependent Claim
87 words
The holographic notch filter of claim 6 wherein the ethylenically unsaturated monomer is a mixture of a solid monomer selected from the group consisting of N-vinyl carbazole, 3,6-dibromo-9-vinyl carbazole, 2,4,6-tribromophenyl acrylate or methacrylate, pentachlorophenyl acrylate or methacrylate, 2-vinyl naphthalene, 2-naphthyl acrylate or methacrylate, 2-(2-naphthyloxy)ethyl acrylate or methacrylate, para-biphenyl methacrylate, t -butylphenyl methacrylate, di-(2-acryloxyethyl)ether of tetrabromobisphenol-A and mixtures thereof; and a liquid monomer selected from the group consisting of 2-phenoxyethyl acrylate, 2-phenoxyethyl methacrylate, phenol ethoxylate monoacrylate, 2-(1-naphthyloxy) ethyl acrylate, o -biphenyl methacrylate, o -biphenyl acrylate, and mixtures thereof.
Claim 10
Dependent Claim
31 words
The holographic notch filter of claim 6 wherein the components are present in the following approximate weight ranges: binder, 45 to 75%; monomer, 15 to 50%; and plasticizer, 0 to 15%.
Claim 11
Dependent Claim
20 words
The holographic notch filter of claim 9 wherein the hologram has a refractive index modulation of greater than approximately 0.025.
Claim 12
Dependent Claim
25 words
The holographic notch filter of claim 6 wherein the transparent substrate is selected from the group consisting of glass, quartz, polymethyl methacrylate, polycarbonate, and polystyrene.
Claim 13
Dependent Claim
15 words
The holographic notch filter of claim 6 additionally comprising one or more transparent polymeric films.
Claim 14
Dependent Claim
18 words
The holographic notch filter of claim 6 additionally comprising a protective layer attached to the transparent polymeric film.
Claim 15
Dependent Claim
22 words
The holographic notch filter of claim 6 wherein the film has a thickness in the range of approximately 10 to 100 micrometers.
Claim 16
Dependent Claim
19 words
The notch filter of claim 1 comprising a plurality of polymeric films imaged to reflect light having different wavelengths.
Claim 17
Dependent Claim
18 words
The notch filter of claim 1 wherein the polymeric film is imaged to reflect light having different wavelengths.
References Cited (Backward Citations)
No citation records indexed.
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